Harrow-tooth.



PATENTED SEPT. 26, 1905.

J. W. SMITH.

HARROW TOOTH.

APPLICATION FILED MAY 22,1905

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ATTORNEYS UNITED STATES JAMES WILSON SMITH, OF TROUPE, TEXAS.

HARROW-TOOTH.

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed May 22, 1905. Serial No. 261,590.

To all whom it may concern.-

Be it known that I, JAMES WILsoN SMITH, a citizen of the United States, and a resident of Troupe, in the county of Smith and State of Texas, have made certain new and useful Improvements in Harrow-Teeth, of which the following is a specification.

My invention is an improvement in harrow-teeth; and it consists in certain novel constructions and combinations of parts hereinafter described and claimed.

Referring to the drawings forming a part hereof, Figure l is a side elevation, partly in section, of a harrow provided with my improved tooth; and Fig. 2 is a perspective view of a single tooth.

In the practical application of my invention I provide a frameAof ordinary construction and comprising longitudinal and cross bars a. The bars may be arranged in the ordinary A shape or rectangularly, as desired. A plurality of teeth B are secured to the bars of the frame by bolts 1), traversing the bars and an angular portion of the tooth. Each of the teeth B comprises a convex shank b, terminating in a convex blade I), having its edges cut obliquely away, as at 5 to form a point, and one side of the blade is extended upwardly and outwardly to form a concavoconvex moldboard 6 whose outer edge 6* forms a continuation of the oblique edge of the blade. A brace 11 is secured to the rear face of the blade and extends upwardly and backwardly to the top of the bar a, to which the tooth is secured, and has formed in the end thereof an eye I), engaging the bolt 6 and secured by the nut 6 While I have shown my improved tooth as applied to a harrow, I do not limit myself to this construction, since it is evident that the tooth is equally applicable for use in cultivators.

In the present instance I have shown my improved tooth as constructed from a single piece of steel, with the shank, blade, and moldboard integral, and this is the preferred form of construction; but the blade may be formed of a separate piece, or the shank, blade, and moldboard may be each formed separately.

Among the advantages of my improvement may be mentioned a more thorough cultivation and pulverization of the soil. A

closer cultivation of crops may be also attained by its use. When used in a cultivator, a much more thorough eradication of weeds is secured than by the use of the ordinary cultivator-point, since the Weeds are cut off beneath the surface of the ground and are turned under the dirt instead of being merely scratched, as with the ordinary construction.

While I have shown and described my invention as applied to the ordinary form of harrow, it will be evident that by using a properly-curved shank it is capable of being used with spring-toothed harrows and cultivators, the brace, however, being omitted when so used.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a harrow, the combination of a frame a plurality of teeth secured to the frame, each comprising a shank, a convex blade integral with the shank and cut away obliquely to form a point, a moldboard extending upwardly and outwardly from one side of the blade, its outer edge forming a continuation of the obliquely-cut edge of the blade, and a brace connecting the rear of the blade with the frame.

2. In a harrow the combination of a frame, a plurality of teeth secured to the frame each comprising a shank, a convex blade integral with the shank and cut away obliquely to form a point, and a moldboard integral with the blade, its outer edge forming a continuation of the obliquely-cut edge of the blade.

3. In a harrow, the combination of a frame, a plurality of teeth secured to the frame each comprising a shank a convex blade integral therewith and a moldboard extending laterally from the convex blade.

4. A harrow-tooth, comprising a shank, a convex blade integral therewith, and cut away obliquely to form a point, a laterallyextending moldboard on the convex blade, the outer edge of the moldboard forming a continuation of the oblique edge of the blade.

JAMES WILSON SMITH.

I/Vitnesses:

J. H. GRIFFIN, M. M. JOYNER. 

